On the basis of mode of formation, polymers can be classified as:
1. Addition polymers only.
2. Condensation polymers only.
3. Co-polymers.
4. Both addition and condensation polymers.

Rubber is heated with sulphur and the process is known as:

1. Galvanization.

2. Vulcanization.

3. Bessemerization.

4. Sulphonation.

Buna-S is a synthetic copolymer of:

1. Styrene and buta-1,3-diene.

2. Styrene and ethylene.

3. 1,3-Butadiene and ethylene.

4. None of the above.

Match the polymers given in Column I with their chemical names given in Column II.

Codes

The monomer units of PTFE are:

1. Cl₂CH-CH₃

2. F₂C=CF₂

3. F₃C-CF₃

4. FClC=CF₂

Peroxide initiated polymerizations occur via -

1. Hydrocarbon combustion 

2. Natural process synthesis

3. Isomeric saponification

4. Free radical chain propagation

The catalyst used in the manufacture of polythene by Ziegler method is:
1. Titanium tetrachloride and triphenyl galium 
2. Titanium tetrachloride and triethyl aluminium
3. Titanium dioxide
4. Titanium isopropoxide

The reagent that is used for converting propylene to polypropylene is: 

1. TiCl₃ + K/THF

2. TiCl₄ + Al(C₂H₅)₃

3. TiCl₃ + (CH₃)₂Mg

4. TiCl₄ + CH₃(CH₂)₃Al

Monomer of neoprene is: 

1.
2.
3.
4.

Polyacrylonitrile, characterized by the  repeating unit is made from the monomer: 

1. ${\mathrm{CH}}_2=\mathrm{CHCN}$

2. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CN}$

3. ${\mathrm{HOCH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_3$

4. ${\mathrm{CH}}_3\mathrm{CH}=\mathrm{CHCN}$